Wind power generator is one of the core components converting wind energy to electric energy. With the rapid developed technology of wind power generation including wind power generators since the end of 70＇s last century, various topologies of wind power generator and wind power systems are developed. The technologies and features of different kinds of wind power generators worldwide are firstly overviewed. Then their control features and drive train types and their strengths and weaknesses are analyzed and compared. Finally the latest development trend and research progress of wind power generator technologies are presented, hoping to offer reference for the research and development of wind power generation in China.